From patchwork Fri Apr 16 11:42:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aswath Govindraju X-Patchwork-Id: 423189 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9AAB4C43470 for ; Fri, 16 Apr 2021 11:43:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 817D36102A for ; Fri, 16 Apr 2021 11:43:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243056AbhDPLnk (ORCPT ); Fri, 16 Apr 2021 07:43:40 -0400 Received: from fllv0016.ext.ti.com ([198.47.19.142]:54008 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242997AbhDPLnd (ORCPT ); Fri, 16 Apr 2021 07:43:33 -0400 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 13GBh0vW111994; Fri, 16 Apr 2021 06:43:00 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1618573380; bh=Ryko66IKKHG8clhvZB4lEXluQaivBm5g11UZcC934ok=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=RppKYSZyFj0r36v8+fFHuNTdLKmZWTshoLm3g74+OeGm5ygmPQ+UUQL+xsnQOrYH0 ARgtTBGDpQa3YiGV1Li/m51YBHyqogkoZ2kX3WYZ6dx06wmSVt+NpvliGZilIBUXlc CxnyebjDtunEEz2EovTpysv4KJf1CzzhG/NaEf+M= Received: from DLEE100.ent.ti.com (dlee100.ent.ti.com [157.170.170.30]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 13GBh01D094516 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Fri, 16 Apr 2021 06:43:00 -0500 Received: from DLEE114.ent.ti.com (157.170.170.25) by DLEE100.ent.ti.com (157.170.170.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Fri, 16 Apr 2021 06:42:59 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DLEE114.ent.ti.com (157.170.170.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2 via Frontend Transport; Fri, 16 Apr 2021 06:42:59 -0500 Received: from gsaswath-HP-ProBook-640-G5.dal.design.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 13GBgj3E039401; Fri, 16 Apr 2021 06:42:55 -0500 From: Aswath Govindraju CC: , , , , Marc Kleine-Budde , Wolfgang Grandegger , Rob Herring , "David S . Miller" , Jakub Kicinski , Chandrasekar Ramakrishnan , Kishon Vijay Abraham I , Lokesh Vutla , Vignesh Raghavendra , Grygorii Strashko , Faiz Abbas , Aswath Govindraju Subject: [PATCH v3 2/2] can: m_can: Add support for transceiver as phy Date: Fri, 16 Apr 2021 17:12:45 +0530 Message-ID: <20210416114245.24829-3-a-govindraju@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210416114245.24829-1-a-govindraju@ti.com> References: <20210416114245.24829-1-a-govindraju@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Faiz Abbas Add support for implementing transceiver node as phy. The max_bitrate is obtained by getting a phy attribute. Signed-off-by: Faiz Abbas Signed-off-by: Aswath Govindraju --- drivers/net/can/m_can/m_can.c | 10 ++++++++++ drivers/net/can/m_can/m_can.h | 2 ++ drivers/net/can/m_can/m_can_platform.c | 13 +++++++++++++ 3 files changed, 25 insertions(+) diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index 34073cd077e4..7d31250446c2 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -21,6 +21,7 @@ #include #include #include +#include #include "m_can.h" @@ -1514,6 +1515,7 @@ static void m_can_stop(struct net_device *dev) static int m_can_close(struct net_device *dev) { struct m_can_classdev *cdev = netdev_priv(dev); + int err; netif_stop_queue(dev); @@ -1536,6 +1538,10 @@ static int m_can_close(struct net_device *dev) close_candev(dev); can_led_event(dev, CAN_LED_EVENT_STOP); + err = phy_power_off(cdev->transceiver); + if (err) + return err; + return 0; } @@ -1720,6 +1726,10 @@ static int m_can_open(struct net_device *dev) struct m_can_classdev *cdev = netdev_priv(dev); int err; + err = phy_power_on(cdev->transceiver); + if (err) + return err; + err = m_can_clk_start(cdev); if (err) return err; diff --git a/drivers/net/can/m_can/m_can.h b/drivers/net/can/m_can/m_can.h index ace071c3e58c..38cad068abad 100644 --- a/drivers/net/can/m_can/m_can.h +++ b/drivers/net/can/m_can/m_can.h @@ -28,6 +28,7 @@ #include #include #include +#include /* m_can lec values */ enum m_can_lec_type { @@ -82,6 +83,7 @@ struct m_can_classdev { struct workqueue_struct *tx_wq; struct work_struct tx_work; struct sk_buff *tx_skb; + struct phy *transceiver; struct can_bittiming_const *bit_timing; struct can_bittiming_const *data_timing; diff --git a/drivers/net/can/m_can/m_can_platform.c b/drivers/net/can/m_can/m_can_platform.c index 599de0e08cd7..f102d532b7f0 100644 --- a/drivers/net/can/m_can/m_can_platform.c +++ b/drivers/net/can/m_can/m_can_platform.c @@ -6,6 +6,7 @@ // Copyright (C) 2018-19 Texas Instruments Incorporated - http://www.ti.com/ #include +#include #include "m_can.h" @@ -67,6 +68,7 @@ static int m_can_plat_probe(struct platform_device *pdev) struct resource *res; void __iomem *addr; void __iomem *mram_addr; + struct phy *transceiver; int irq, ret = 0; mcan_class = m_can_class_allocate_dev(&pdev->dev, @@ -101,6 +103,16 @@ static int m_can_plat_probe(struct platform_device *pdev) goto probe_fail; } + transceiver = devm_phy_optional_get(&pdev->dev, NULL); + if (IS_ERR(transceiver)) { + ret = PTR_ERR(transceiver); + dev_err_probe(&pdev->dev, ret, "failed to get phy\n"); + return ret; + } + + if (transceiver) + mcan_class->can.bitrate_max = transceiver->attrs.max_link_rate; + priv->base = addr; priv->mram_base = mram_addr; @@ -108,6 +120,7 @@ static int m_can_plat_probe(struct platform_device *pdev) mcan_class->pm_clock_support = 1; mcan_class->can.clock.freq = clk_get_rate(mcan_class->cclk); mcan_class->dev = &pdev->dev; + mcan_class->transceiver = transceiver; mcan_class->ops = &m_can_plat_ops;